40464866219993 has 2 divisors, whose sum is σ = 40464866219994. Its totient is φ = 40464866219992.

The previous prime is 40464866219983. The next prime is 40464866220049. The reversal of 40464866219993 is 39991266846404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32387970427849 + 8076895792144 = 5691043^2 + 2841988^2 .

It is a cyclic number.

It is not a de Polignac number, because 40464866219993 - 2²⁰ = 40464865171417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40464866219923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20232433109996 + 20232433109997.

It is an arithmetic number, because the mean of its divisors is an integer number (20232433109997).

Almost surely, 2^{40464866219993} is an apocalyptic number.

It is an amenable number.

40464866219993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40464866219993 is an equidigital number, since it uses as much as digits as its factorization.

40464866219993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483729408, while the sum is 71.

The spelling of 40464866219993 in words is "forty trillion, four hundred sixty-four billion, eight hundred sixty-six million, two hundred nineteen thousand, nine hundred ninety-three".